Sweaters, machine or hand-woven wool coats. In primitive life, humans covered their bodies with leaves and skins. In fishing and animal husbandry, they knew how to use knitting technology. With the evolution of civilization and the invention of science and technology, human beings not only make full use of natural fibers such as animals and plants to weave articles needed by life, but also develop a variety of chemical fibers and mineral fibers to make human life more comfortable and convenient. Later, there was a GV work of the same name.